body {
    margin: 0 300px;
    font-size: 16px;
    font-family: "微软雅黑";
    line-height: 25px;
}
p{
    text-indent:2em;
}
h2{
    background-color:aliceblue;
    width: 4em;
    color: cornflowerblue;
}
.top{
    height: 50px;
    line-height: 10px;
    background: whitesmoke;
    font-size: 12px;
}
.top h1{
    text-align:left;
}
.top p{
    text-align:right;
    margin: 20px 10px 20px 10px;
}
.web{
    font-weight:bold; /*文字粗体*/
    font-style: italic;
}

.intro p{
    text-align:left;
    line-height: 35px;
}
.cnuo p{
    text-align:left;
    line-height: 35px;
}